VEHICLE SENSOR ABNORMALITY DETECTION UNIT, TRAFFIC SITUATION ANALYZER, VEHICLE SENSOR ABNORMALITY DETECTION SYSTEM, AND TRAFFIC SITUATION ANALYSIS SYSTEM AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To make it possible to highly precisely detect an abnormality of a vehicle sensor without the necessity of a device, which acquires information, aside from the vehicle sensor.SOLUTION: A traffic control central system 1 that detects an abnormality of any of vehicle sensors 2 disposed over a road network includes a first traffic management unit 11 that acquires sensor information, which contains a measured numerical quantity, from each of the vehicle sensors, a statistical processing unit 23 that performs statistical processing on measured numerical quantities over each specified period and generates statistical information containing a statistical value of the measured numerical quantities, a map information production unit 24 that generates map information, which represents a distribution situation of statistical values of measured numerical quantities in an abnormal state, on the basis of the statistical value of the measured numerical quantities concerning a vehicle sensor that has already been recognized as an abnormal one by a user, and a sensor state discrimination unit 25 that discriminates an abnormality of a vehicle sensor on the basis of the measured numerical quantities of the vehicle sensor that is an object of discrimination and the map information in the abnormal state.SELECTED DRAWING: Figure 1